Abdominal trauma...Blunt abdominal trauma can be explained by : direct blow - compression and...
Transcript of Abdominal trauma...Blunt abdominal trauma can be explained by : direct blow - compression and...
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ABDOMINAL TRAUMA Done by : dina jebril
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Outlines :
■ Brief information about Anatomy of the abdomen
■ Know the difference between penetrating and blunt trauma
■ Mechanism of injury
■ Mangment
■ Specific diagnosis
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Anatomy of the abdomen
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What is the difference between blunt trauma and penetrating trauma ?
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Mechanism of injury
■ Blunt abdominal trauma can be explained by :
■ direct blow
- compression and crushing injuries to abdominal viscera
- such force deform solid and hollow organs and can cause rupture with secondary hemorrhage
- contamination by visceral contents and associated peritonitis
rapid deceleration ( shearing injuries)
differential movement of fixed and nonfixed parts of the body
example: laceration injury to liver and spleen both are movable organs at the sites of their fixed supporting ligaments
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■ In patients who sustain blunt trauma the organs most frequently injured
spleen (40%-55%) ( this is from the book)
but recently the most common organ injured in both blunt and penetrating trauma is
the liver )
liver ( 35%-45%)
small bowel (5%-10%)
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Penetrating trauma ■ stab wounds and low velocity gunshot wounds cause tissue damage by lacerating
and cutting
■ High velocity gunshot wounds transfer more kinetic energy to abdominal viscera
■ Stab wounds traverse adjacent abdominal structures and most commonly involve
the live (40%) small bowel(30%) diaphragm(20%) and colon (15%)
■ gunshot wounds may cause additional intraabdominal injuries based upon the
trajectory, cavitation ,effect, and possible bullet fragmentation
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So mechanism of injury is very important, you can suspect it through history and physical examination ■ Through hx:-
■ motor vehicle crash
■ ,pertinent historical information includes
speed of the vehicle,
type of collision (e.g., frontal impact, lateral impact, sideswipe, rollover),
types of restraints,
deployment of air bags, patient’s position in the vehicle, and status of passengers,
if any.
■ For patients injured by falling,
the height of the fall is important to determine due to the potential for deceleration injury
from greater heights.
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■ When assessing a patient who has sustained penetrating trauma,
pertinent historical information includes:-
** the time of injury
**type of weapon (e.g., knife, handgun, rifle, or shotgun),
** distance from the assailant (particularly important with shotgun wounds, as the likelihood of major visceral injuries decreases beyond the 10-foot or 3-meter range), number of stab wounds or shots sustained,
** the amount of external bleeding from the patient noted at the scene.
If possible, important additional information to obtain from the patient includes the magnitude and location of any abdominal pain.
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Left
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Penetrating traumaclassification
One third do not penetrate the
abdominal cavity
One third penetrate the
abdominal cavity but don’t cause
any significant intra abdominal
injury
One third do cause significant
abdominal damage
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Blunt trauma
In awake unimpaired patient
without abdominal complaints
Hospital admission+ seril
abdominal examination
(Rare)
Unstable patient with abdominal
injury
Immediate celiotomy
Unstable patient with multiple
injury
FAST exam may be useful
Stable patient with multiple injuries
Abdomen may harbor occult organ
involvement >>
Ct scan is necessary
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Options to assess abdominal injury :-
■ CXR ( free air under diaphragm)
■ Ultrasound (FAST)
■ DPL (diagnostic peritoneal lavage)
■ CT abdomen with contrast ( if the patient is hemodynamically stable ct scan is the
best assessment tool ) note: ct scan is contraindicated in hemodynamically
unstable patient )
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FAST( focused assessment sonography in trauma)
FAST is one of two rapid studies utilized to identify hemorrhage.
■ In FAST, ultrasound technology is used by properly trained individuals to detect the
presence of hemoperitoneum
■ With specific equipment and in experienced hands, ultrasound has a sensitivity,
specificity, and accuracy in detecting intraabdominal fluid comparable to DPL.
■ Thus, ultrasound provides a rapid, noninvasive, accurate, and inexpensive means of
diagnosing hemoperitoneum that can be repeated frequently
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■ four regions
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FAST image of
the right upper quadrant
showing the liver, kidney,
and
free fluid.
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DPL ( diagnostic peritoneal lavage)
■ The doctor said NO need to know about it // recently not used
■ FAST scan is not available or in the setting of equivocal FAST scan
■ how it is done?
small abdominal incision is made under local anesthesia and a catheter is inserted into peritoneal cavity
the test begins with peritoneal aspiration (>20 cc of gross blood is aspirated ,+) (DPA) >> transfer to OR
no blood detected >> perform a lavage of peritoneal cavity with one liter of normal saline
+ DPL > 100,000 RBCs / mm3 defined by biochemical analysis
DPA like FAST can not detect retroperitoneal bleeds
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Penetrating abdominal injury
■ Initial management
■ ABCs ( primarily concerned with blood loss)
■ Focused physical examination
■ Assessment of injury { plain x ray , stabilize patient : ct scan , unstable: FAST not
useful in penetrating trauma // not used )
■ All GSWs to the abdomen will need exploratory laparotomy
■ Stab wounds may treated conservatively or require exploratory laparotomy
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Blunt trauma ■ Initial management
■ ABCs ( primarily concerned with blood loss)
■ Focused physical examination
■ Assessment of injury { plain x ray , stabilize patient : ct scan , unstable: FAST)
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Indications for emergent laparotomy in penetrating abdominal trauma :-
■ Any hemodynamically abnormal patient
■■ Gunshot wound with a transperitoneal trajectory
■■ Signs of peritoneal irritation
■■ Signs of fascia penetration
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Emergent laparotomy ■ ■■ Blunt abdominal trauma with hypotension with a positive FAST or clinical evidence of
intraperitoneal bleeding
■ ■■ Blunt or penetrating abdominal trauma with a positive DPL
■ ■■ Hypotension with a penetrating abdominal wound
■ ■■ Gunshot wounds traversing the peritoneal cavity or visceral/vascular retroperitoneum
■ ■■ Evisceration
■ ■■ Bleeding from the stomach, rectum, or genitourinary tract from penetrating trauma
■ ■■ Peritonitis
■ ■■ Free air, retroperitoneal air, or rupture of the hemidiaphragm
■ ■■ Contrast-enhanced CT that demonstrates ruptured gastrointestinal tract, intraperitoneal
bladder injury, renal pedicle injury, or severe visceral parenchymal injury after blunt or
penetrating trauma
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Subsequent management :- after blunt trauma ■ what is the management of intra abdominal bleeding due to splenic injury?
hemodynamically stable / no indications for laparotomy
preferred management >> splenic embolization
hemodynamically unstable >> surgical exploration and splenectomy or splenorraphy
** what is the management of intra abdominal bleeding due to liver injury ?
Most patients with liver injury can be managed conservatively
patient stable but demonstrates ongoing bleeding
embolization ,
Unstable >> surgical exploration is necessary
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Specific diagnosis ■ DIAPHRAGM INJURIES
■ Blunt tears can occur in any portion of either diaphragm;
The left hemidiaphragm is more commonly injured.
The most common injury is 5 to 10 cm in length and involves the posterolateral left
hemidiaphragm.
■ Abnormalities on the initial chest x-ray include elevation or “blurring” of the
hemidiaphragm, hemothorax, an abnormal gas shadow that obscures the
hemidiaphragm, or the gastric tube positioned in the chest. However, the initial chest x-
ray can be normal
In a small percentage of patients. The diagnosis should be suspected with any wound of
the thoracoabdomen and may be confirmed with laparotomy, thoracoscopy, or laparoscopy
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■ DUODENAL INJURIES
■ Duodenal rupture is classically encountered in unrestrained drivers involved in
frontal-impact motor vehicle collisions and patients who sustain direct blows to the
abdomen.
■ bloody gastric aspirate or retroperitoneal air on a flat plate x-ray of the abdomen or
abdominal CT should raise suspicion for this injury.
■ .An upper gastrointestinal x-ray series or double-contrast CT is indicated for high-risk
patients
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■ PANCREATIC INJURIES
■ Pancreatic injuries most often result from a direct epigastric blow that compresses
the organ against the vertebral column.
■ An early normal serum amylase level does not exclude major pancreatic trauma.
Conversely, the amylase level can be elevated from nonpancreatic sources.
■ However, persistently elevated or rising serum amylase levels should prompt further
evaluation of the pancreas and other abdominal viscera.
■ Double-contrast CT may not identify significant pancreatic trauma in the immediate
postinjury period (up to 8 hours); it should be repeated later if pancreatic injury is
suspected. Should there be concern after an equivocal CT, surgical exploration of
the pancreas is warranted
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■ HOLLOW VISCUS INJURIES
■ Blunt injury to the intestines generally results from sudden deceleration with
subsequent tearing near a fixed point of attachment, especially if the patient’s seat
belt was applied incorrectly.
■ The appearance of transverse, linear ecchymoses on the abdominal wall (seat-belt
sign) or the presence of a lumbar distraction fracture (Chance fracture) on x-ray
should alert the clinician to the possibility of intestinal injury.
■ Although some patients have early abdominal pain and tenderness, diagnosis can
be difficult in others, especially because injured intestinal structures may only
produce minimal hemorrhage
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References:-
■ ATLS Student course manual / 9th edition
■ The Washington Manual of surgery /8th edition
■ Surgery: A Case Based Clinical Review
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■ Thank you